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There are three main categories of joints. They are immovable, slightly movable, and freely movable. Immovable would be joints that are sutured together such as your cranial bones. Slightly movable involves the disc of cartilage between two bones such as your intervertebral discs. Freely moving includes many different ways of meeting up. This includes ball and socket (shoulder and hip), hinge (elbow and knee), pivot (first two vertebrae in spinal column), saddle (thumb), gliding (wrists), and condyloid (knuckles and jaw).

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15y ago
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7y ago

They allow for movement, basically. They also absorb the impact if a bone is hit, which is why joints are more likely to be injured than the bones themselves, like spraining your ankle.

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10y ago

there are different types of joints in the body because if there werent we wouldnt be able to move our bodyparts in different ways.

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14y ago

So we can move and bend. without joints our arms, legs ect would be straight.

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6y ago

We need joints to be able to move, walk, lift, and bend.

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6y ago

So we can change shape.

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Q: Why do we need joints in our skeleton?
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